I have a 6 week old kitten that developed severe diarrhea 5 days ago. I took her to the vets 3 days ago. Stool culture positive for coccidia. She has been on treatment for 3 days with no improvement. Her rectal area is raw. She is eating and drinking but obviously does not feel well. I have been bathing her and putting Desitin on her rectal area per my vets recommendation. Shouldn’t she be getting better by now?